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<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-04-19</periodOfReport>

    <notSubjectToSection16>true</notSubjectToSection16>

    <issuer>
        <issuerCik>0001691303</issuerCik>
        <issuerName>WARRIOR MET COAL, INC.</issuerName>
        <issuerTradingSymbol>HCC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001520692</rptOwnerCik>
            <rptOwnerName>KKR Credit Advisors (US) LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>555 CALIFORNIA STREET,</rptOwnerStreet1>
            <rptOwnerStreet2>50TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94104</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001399770</rptOwnerCik>
            <rptOwnerName>Kohlberg Kravis Roberts &amp; Co. L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>9 WEST 57TH STREET, SUITE 4200</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001472693</rptOwnerCik>
            <rptOwnerName>KKR Management Holdings L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O KOHLBERG KRAVIS ROBERTS &amp; CO. L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>9 WEST 57TH STREET, SUITE 4200</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001472692</rptOwnerCik>
            <rptOwnerName>KKR Management Holdings Corp</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O KOHLBERG KRAVIS ROBERTS &amp; CO. L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>9 WEST 57TH STREET, SUITE 4200</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001472696</rptOwnerCik>
            <rptOwnerName>KKR Group Holdings L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O KOHLBERG KRAVIS ROBERTS &amp; CO. L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>9 WEST 57TH STREET, SUITE 4200</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001472695</rptOwnerCik>
            <rptOwnerName>KKR Group Ltd</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O KOHLBERG KRAVIS ROBERTS &amp; CO. L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>9 WEST 57TH STREET, SUITE 4200</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001404912</rptOwnerCik>
            <rptOwnerName>KKR &amp; Co. L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O KOHLBERG KRAVIS ROBERTS &amp; CO. L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>9 WEST 57TH STREET, SUITE 4200</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001472694</rptOwnerCik>
            <rptOwnerName>KKR Management LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O KOHLBERG KRAVIS ROBERTS &amp; CO. L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>9 WEST 57TH STREET, SUITE 4200</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001081714</rptOwnerCik>
            <rptOwnerName>KRAVIS HENRY R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O KOHLBERG KRAVIS ROBERTS &amp; CO. L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>9 WEST 57TH STREET, SUITE 4200</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001081715</rptOwnerCik>
            <rptOwnerName>ROBERTS GEORGE R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O KOHLBERG KRAVIS ROBERTS &amp; CO. L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>2800 SAND HILL ROAD, SUITE 200</rptOwnerStreet2>
            <rptOwnerCity>MENLO PARK</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94025</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-04-19</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2389274</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>17.8125</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4071745</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This amount represents the $19.00 initial public offering price per share of common stock of Warrior Met Coal, Inc. (&quot;Common Stock&quot;), less the underwriting discount of $1.1875 per share.</footnote>
        <footnote id="F2">Includes shares of Common Stock held in funds or client accounts for which KKR Credit Advisors (US) LLC serves as an investment advisor. Kohlberg Kravis Roberts &amp; Co. L.P. is the sole member of KKR Credit Advisors (US) LLC. KKR Management Holdings L.P. is the general partner of Kohlberg Kravis Roberts &amp; Co. L.P. KKR Management Holdings Corp. is the general partner of KKR Management Holdings L.P. KKR Group Holdings L.P. is the sole shareholder of KKR Management Holdings Corp. KKR Group Limited is the general partner of KKR Group Holdings L.P. KKR &amp; Co. L.P. is the sole shareholder of KKR Group Limited. KKR Management LLC is the general partner of KKR &amp; Co. L.P. Messrs. Henry R. Kravis and George R. Roberts are the designated members of KKR Management LLC.</footnote>
        <footnote id="F3">Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of such Reporting Person's pecuniary interest therein.  The inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of any securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934 or otherwise.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>KKR CREDIT ADVISORS (US) LLC By: /s/ Jeffrey Van Horn Name: Jeffrey Van Horn Title: Vice President</signatureName>
        <signatureDate>2017-04-21</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>KOHLBERG KRAVIS ROBERTS &amp; CO. L.P. By: /s/ Terence P. Gallagher Name: Terence P. Gallagher Title: Attorney-in-fact for William J. Janetschek, Chief Financial Officer</signatureName>
        <signatureDate>2017-04-21</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>KKR MANAGEMENT HOLDINGS L.P. By: KKR Management Holdings Corp., its general partner By: /s/ Terence P. Gallagher Name: Terence P. Gallagher Title: Attorney-in-fact for William J. Janetschek, Chief Financial Officer</signatureName>
        <signatureDate>2017-04-21</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>KKR MANAGEMENT HOLDINGS CORP. By: /s/ Terence P. Gallagher Name: Terence P. Gallagher Title: Attorney-in-fact for William J. Janetschek, Chief Financial Officer</signatureName>
        <signatureDate>2017-04-21</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>KKR GROUP HOLDINGS L.P. By: KKR Group Limited, its general partner By: /s/ Terence P. Gallagher Name: Terence P. Gallagher Title: Attorney-in-fact for William J. Janetschek, Director</signatureName>
        <signatureDate>2017-04-21</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>KKR GROUP LIMITED By: /s/ Terence P. Gallagher Name: Terence P. Gallagher Title: Attorney-in-fact for William J. Janetschek, Director</signatureName>
        <signatureDate>2017-04-21</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>KKR &amp; CO. L.P. By: KKR Management LLC, its general partner By: /s/ Terence P. Gallagher Name: Terence P. Gallagher Title: Attorney-in-fact for William J. Janetschek, Chief Financial Officer</signatureName>
        <signatureDate>2017-04-21</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>KKR MANAGEMENT LLC By: /s/ Terence P. Gallagher Name: Terence P. Gallagher Title: Attorney-in-fact for William J. Janetschek, Chief Financial Officer</signatureName>
        <signatureDate>2017-04-21</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>HENRY R. KRAVIS By: /s/ Terence P. Gallagher Name: Terence P. Gallagher Title: Attorney-in-fact</signatureName>
        <signatureDate>2017-04-21</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>GEORGE R. ROBERTS By: /s/ Terence P. Gallagher Name: Terence P. Gallagher Title: Attorney-in-fact</signatureName>
        <signatureDate>2017-04-21</signatureDate>
    </ownerSignature>
</ownershipDocument>
